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Re: Buyer Beware: A Major Change in NFS is about to happen



On 09/30/2009 04:09 AM, Steve Dickson wrote:
I don't really understand this reason.  When you get a mount fail, why
not try v3?  It doesn't matter whether the kernel gives a different
kind of error or not.

The error that is returned is ENOENT which is fatal error because
it means the remote directory does not exist... and I'm not sure it
would be good to continue flood the network with mounts requests
(I'm thinking about autofs mount storms) for directories that may
or may not be there...

Are mount requests really that resource intensive? If so, perhaps caching mount attempt results and stepping back the protocol would be appropriate.

Really though, switching V4 on without an auto-fallback to V3 seems like a really bad change. Shouldn't there be at least one transitional Fedora release where auto-fallback happens, perhaps with a syslog notice?

--
Brendan Conoboy / Red Hat, Inc. / blc redhat com


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